Main entry: legal
Definition: established by or founded upon law or official or accepted rules
Antonyms: illegal
Definition: prohibited by law or by official or accepted rules
Antonyms: illegitimate
Definition: of marriages and offspring; not recognized as lawful
Antonyms: unlawful
Definition: contrary to or prohibited by or defiant of law
Antonyms: illicit
Definition: contrary to accepted morality (especially sexual morality) or convention
Main entry: legal
Definition: allowed by official rules
Usage: a legal pass receiver
Antonyms: ineligible
Definition: not eligible
Main entry: effectual, sound, legal
Definition: having legal efficacy or force
Usage: a sound title to the property
Antonyms: invalid
Definition: having no cogency or legal force